captioning funded by cbs >>> welcome to cbs thmthm. syria, signs deepings, but signs of a breakthrough. the united states detected signs that syrian's government is preparing chemical weapons for possible use. >> meanwhile, secretary of state hillary clinton is holding an unscheduled meeting in ireland with russia's foreign minister and the u.n. special envoy to syria. a sign russia may be switching sides to put pressure on syria to stop the fighting. in dublin covering talks, margaret, good morning. do you think this is a sign of a diplomatic breakthrough? >> reporter: norah, the sign of a possible diplomatic breakthrough. flying here to dublin for a last-minute meeting with secretary of state hillary clinton and the russian foreign minister. it may signal that russia is finally willing to take u.n. action to send a message to bashar al assad to stop the killing. one of april saud's few remaining allies and so faro posed action to intervene the crisis that killed nearly 40,000 people. >> margaret, charlie rose here. has the report tha